Why to Avoid Caffeinated Energy Drinks

It's important to stay hydrated, but use caution before reaching for that energy drink and consider drinking water instead. According to a small study, highly caffeinated energy drinks can change the heart’s electrical activity.

Previous research has suggested that, in some people, heart problems—including life-threatening cardiac arrest—can develop after consuming energy drinks. The problem is the caffeine, taurine (another stimulant), and high amounts of sugar they contain.

While an occasional energy drink probably won't cause harm for most people, the danger increases when more than one is consumed and when they are consumed during exercise—particularly in warmer weather. Energy drinks can cause dizziness, nausea, excessive sweating, and rapid heart rate and can lead to elevated blood pressure, dehydration, and heat stress.